Toner composition and process thereof

Abstract

A toner comprised of a core comprised a first resin and colorant, and thereover a shell comprised of a second resin and wherein said first resin is an ion complexed sulfonated polyester resin, and said second resin is a transition metal ion complex sulfonated polyester resin.

What is claimed is: 
     
       1. A toner comprised of a core comprised a first resin and colorant, and thereover a shell comprised of a second resin and wherein said first resin is an ion complexed sulfonated polyester resin, and said second resin is a transition metal ion complex sulfonated polyester resin. 
     
     
       2. A toner in accordance with claim 1 wherein said first resin is present in an amount of from about 40 to about 90 percent by weight of toner, and the second resin is present in an amount of from about 10 to about 55 percent by weight of toner and wherein the shell encapsulates said core. 
     
     
       3. A toner in accordance with claim 1 wherein the first resin is of the formula ##STR7## wherein Y is an alkali metal, X is a glycol, and n and m represent the number of segments. 
     
     
       4. A toner in accordance with claim 1 wherein the second resin is of the formula ##STR8## wherein Y is transition metal of a monovalent or multivalent ion of scandium, yttrium, lutertium, titanium, zirconium, hafnium, vanadium, chromium, niobium, tantalum, molybdenum, tungsten, manganese, rhenium, iron, ruthenium, osmium, cobalt, rhodium, iridium, nickel, paladium, copper, platinum, silver, gold, zinc, cadmuim, mercury, aluminum, or mixtures thereof; X is a glycol, and n and m represent the number of segments. 
     
     
       5. A toner in accordance with claim 3 wherein the glycol is neopentyl glycol, ethylene glycol, propylene glycol, butylene glycol, propanediol, diethylene glycol, or mixtures thereof. 
     
     
       6. A toner in accordance with claim 3 wherein said Y alkali is magnesium. 
     
     
       7. A toner in accordance with claim 4 wherein said Y metal is zinc. 
     
     
       8. A toner in accordance with claim 1 wherein the colorant is a cyan, black, magenta, yellow dispersion or mixtures thereof with from about 20 to about 60 weight percent solids of colorant. 
     
     
       9. A toner in accordance with claim 1 wherein said colorant is carbon black. 
     
     
       10. A toner in accordance with claim 1 wherein said colorant is a dye. 
     
     
       11. A toner in accordance with claim 1 wherein said colorant is a pigment. 
     
     
       12. A toner in accordance with claim 1 wherein said colorant is comprised of a mixture of a pigment and a dye. 
     
     
       13. A toner in accordance with claim 1 wherein said first resin is the magnesium salt of copoly (1,2-propylene-dipropylene-5-Sulfoisophtalate)-copoly (1,2-propylene-dipropylene terephthalate), the magnesium salt of copoly (1,2-propylene-diethylene-5-Sulfoisophtalate)-copoly (1,2-propylene-diethylene terephthalate), the calcium salt of copoly (1,2-propylene-dipropylene-5-Sulfoisophtalate)-copoly (1,2-propylene-dipropylene terephthalate), or the barium salt of copoly (1,2-propylene-diethylene-5-Sulfoisophtalate)-copoly (1,2-propylene-diethylene terephthalate). 
     
     
       14. A toner in accordance with claim 1 wherein said second resin is the zinc salt of copoly (1,2-propylene-diethylene-5-Sulfoisophtalate)-copoly (1,2-propylene-diethylene terephthalate), the zince salt of copoly (1,2-propylene-diethylene-5-Sulfoisophtalate)-copoly (1,2-propylene-diethylene terephthalate), the vanadium salt of copoly (1,2-propylene-dipropylene-5-Sulfoisophtalate)-copoly (1,2-propylene-dipropylene terephthalate), or the copper salt of copoly (1,2-propylene-diethylene-5-Sulfoisophtalate)-copoly (1,2-propylene-diethylene terephthalate). 
     
     
       15. A toner in accordance with claim 1 wherein said toner contains in the shell additives comprised of metal salts, metal salts of fatty acids, colloidal silicas, metal oxides, or mixtures thereof which additives are each optionally present in an amount of from about 0.1 to about 2 weight percent. 
     
     
       16. A toner in accordance with claim 3 wherein said glycol, is an aliphatic glycol of neopentyl glycol, ethylene glycol, propylene glycol, butylene glycol, pentylene glycol, propanediol, 1,2-propanediol, diethylene glycol, or mixtures thereof; and n and m represent each is about 10 to about 30 each, and wherein the weight average molecular weight of said polyester is from about 2,000 grams per mole to about 100,000 grams per mole, the number average molecular weight is from about 1,000 grams per mole to about 50,000 grams per mole, and the polydispersity thereof is from about 2 to about 18 as measured by getpermeation chromatography. 
     
     
       17. A toner in accordance with claim 1 wherein said first resin is the magnesium salt of copoly (1,2-propylene-dipropylene-5-sulfoisophtalate)-copoly (1,2-propylene-dipropylene terephthalate). 
     
     
       18. A toner in accordance with claim 1 wherein said second resin is the zinc salt of copoly (1,2-propylene-diethylene-5-Sulfoisophtalate)-copoly (1,2-propylene-diethylene terephthalate). 
     
     
       19. A toner comprised of a resin core and colorant, and a resin shell and wherein said core resin is an alkali polyester resin, and said resin shell is a transition metal polyester resin. 
     
     
       20. A toner in accordance with claim 19 wherein said core resin is an alkali complexed sulfonated polyester and said resin shell is a transition metal ion complex of a sulfonated polyester resin. 
     
     
       21. A toner comprised of a core comprised a first resin and colorant, and a second resin shell wherein said first resin is of the formula ##STR9## wherein Y is an alkali metal, X is a glycol, and n and m represent the number of segments, and said second said resin is a transition metal ion complex sulfonated polyester resin ##STR10## and wherein Y is a monovalent transition metal, or a divalent transition metal, x is a glycol and n and m represent the number of segments. 
     
     
       22. A toner in accordance with claim 1 wherein the toner particle size is from about 3 to about 15 microns in volume average diameter. 
     
     
       23. A toner in accordance with claim 3 wherein said Y alkali metal is a magnesium (Mg ++ ), berylium (Be ++ ), calcium (Ca ++ ) or Barium (Ba ++ ); and wherein each n and m is a number of from about 10 to about 30, and wherein the weight average molecular weight thereof of said core resin is from about 2,000 grams per mole to about 100,000 grams per mole, the number average molecular weight is from about 1,000 grams per mole to about 50,000 grams per mole, and the polydispersity is from about 2 to about 18 as measured by gel permeation chromatography. 
     
     
       24. A toner accordance with claim 3 wherein X is aliphatic glycol of neopentyl glycol, ethylene glycol, propylene glycol, butylene glycol, pentylene glycol, propanediol, 1,2-propanediol, diethylene glycol, or mixtures thereof. 
     
     
       25. A toner process comprising (I) admixing an alkali metal sodio sulfonated polyester resin, colorant; and add a transition metal sodio sulfonated polyester and optionally adding to said toner wax, charge additive, and surface flow additives. 
     
     
       26. A toner process comprising (I) preparing a colloidal solution of a sodio sulfonated polyester resin by heating said solution at a temperature of from about 75 to about 95 degrees Centigrade; adding thereto a sodio sulfonated polyester; cooling; adding thereto a colorant, followed by heating the resulting mixture and adding thereto an aqueous solution containing an alkali (II) salt; adding a further amount of colloidial sulfonated polyester resin, followed by the addition of an aqueous solution of a transition metal salt solution; isolating said toner resulting, and drying said toner. 
     
     
       27. A process in accordance with claim 25 wherein said toner is isolated, filtered, washed with water, and dried.